Finding the Fourth Proportional to 9,510.60, 13,121.28 and 5,530.80

Step by Step Solution

1. Step 1: Write the proportion equation
   9,510.60 : 13,121.28 = 5,530.80 : x
2. Step 2: Convert to fraction form
   9,510.60/13,121.28 = 5,530.80/x
3. Step 3: Cross multiply
   9,510.60x = 13,121.28 × 5,530.80
4. Step 4: Simplify right side
   9,510.60x = 72,571,175.42
5. Step 5: Solve for x
   x = 72,571,175.42/9,510.60
6. Step 6: Final answer
   x = 7,630.56